Separable button.



No. 727,546. PATBNTED MAY '5, 1903. L. e. KUNZB.

SEPARABLE BUTTON. APPLICATION FILED AUG. 22, 1902.

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UNrrnn STATES Patented May 5, 1903.

PATENT OFFICE,

LOUIS G. KUNZE, OF PROVIDENCE, RHODE ISLAND, ASSIGNOR TO C. C. DARLING AND (30., OF PROVIDENCE, RHODE ISLAND, A FIRM.

SEPARABLE BUTTON.

SPECIFICATION forming part of Letters Patent No. 727,546, dated May 5, 1903.

Application filed August 22, 1902. $erial No. 120,704. (No model.)

T 0 rtZZ whom, it may concern:

Be it known that I, LOUIS G. KUNZE, a citizen of the United States, residing at Providence, in the State of Rhode Island, have invented a new and useful Improvement in Separable Buttons, of which the following is a specification.

My invention relates to that class of separable buttons in which the head and shoe are connected to each other by means of a screw threaded post; and it consists in the employment of a spirally corrugated hollow post made integral with the stiffening-plate of the shoe.

In the accompanying drawings, Figure 1 represents an axial section of a separable button provided with my improvement. Fig. 2 represents an axial section of the stiffeningplate and the spirally-corrugated hollow post.

In the drawings, A represents the head of the button, and B the shoe, the head A being provided with the hollow post 0, having an internal screw-thread a. The post D of the shoe is drawn up from the stifiening-plate E in one piece and provided with a spiral corrugation, which spirally corrugates the inner wall of the post as well as its outer wall and serves to form the external screw-thread b of the post. Heretofore the post for this class of buttons has been made of a solid piece of wire provided with acut screw-thread and soldered onto the stiffening-plate E of the shoe; but by my improvement the comparatively thin stifieningplate E may be made to form the required post, the closed drawn-up hollow post when spirally corrugated serving to form the required externally-screw-threaded post of the shoe.

The head A of the button is provided at its inner side with the spur F, which by engagement with the fabric serves to prevent the head of the button from turning while the post D of the shoe is being screwed into the hollow post 0 of the head.

I claim as my invention In a separable button, the combination of the head A, provided with the hollow post 0, having an internal screw-thread, with the closed hollow post D, formed in one piece with tho stifiening-plate E, of the shoe, and provided with a spiral corrugation which serves to form the required external screw-thread b, of the post, the said internal and exterior screw-threads being in engagement, substantially as described.

LOUIS G. KUNZE.

Witnesses:

SOCRATES SCI-IOLFIELD, FRANK D. JnNKs. 

